diff options
Diffstat (limited to 'kernel/arch/mips/alchemy/devboards/platform.c')
| -rw-r--r-- | kernel/arch/mips/alchemy/devboards/platform.c | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/kernel/arch/mips/alchemy/devboards/platform.c b/kernel/arch/mips/alchemy/devboards/platform.c new file mode 100644 index 000000000..be139a019 --- /dev/null +++ b/kernel/arch/mips/alchemy/devboards/platform.c @@ -0,0 +1,263 @@ +/* + * devoard misc stuff. + */ + +#include <linux/init.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/map.h> +#include <linux/mtd/physmap.h> +#include <linux/slab.h> +#include <linux/platform_device.h> +#include <linux/pm.h> + +#include <asm/bootinfo.h> +#include <asm/idle.h> +#include <asm/reboot.h> +#include <asm/mach-au1x00/au1000.h> +#include <asm/mach-db1x00/bcsr.h> + +#include <prom.h> + +void __init prom_init(void) +{ + unsigned char *memsize_str; + unsigned long memsize; + + prom_argc = (int)fw_arg0; + prom_argv = (char **)fw_arg1; + prom_envp = (char **)fw_arg2; + + prom_init_cmdline(); + memsize_str = prom_getenv("memsize"); + if (!memsize_str || kstrtoul(memsize_str, 0, &memsize)) + memsize = 64 << 20; /* all devboards have at least 64MB RAM */ + + add_memory_region(0, memsize, BOOT_MEM_RAM); +} + +void prom_putchar(unsigned char c) +{ + if (alchemy_get_cputype() == ALCHEMY_CPU_AU1300) + alchemy_uart_putchar(AU1300_UART2_PHYS_ADDR, c); + else + alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c); +} + + +static struct platform_device db1x00_rtc_dev = { + .name = "rtc-au1xxx", + .id = -1, +}; + + +static void db1x_power_off(void) +{ + bcsr_write(BCSR_RESETS, 0); + bcsr_write(BCSR_SYSTEM, BCSR_SYSTEM_PWROFF | BCSR_SYSTEM_RESET); + while (1) /* sit and spin */ + cpu_wait(); +} + +static void db1x_reset(char *c) +{ + bcsr_write(BCSR_RESETS, 0); + bcsr_write(BCSR_SYSTEM, 0); +} + +static int __init db1x_late_setup(void) +{ + if (!pm_power_off) + pm_power_off = db1x_power_off; + if (!_machine_halt) + _machine_halt = db1x_power_off; + if (!_machine_restart) + _machine_restart = db1x_reset; + + platform_device_register(&db1x00_rtc_dev); + + return 0; +} +device_initcall(db1x_late_setup); + +/* register a pcmcia socket */ +int __init db1x_register_pcmcia_socket(phys_addr_t pcmcia_attr_start, + phys_addr_t pcmcia_attr_end, + phys_addr_t pcmcia_mem_start, + phys_addr_t pcmcia_mem_end, + phys_addr_t pcmcia_io_start, + phys_addr_t pcmcia_io_end, + int card_irq, + int cd_irq, + int stschg_irq, + int eject_irq, + int id) +{ + int cnt, i, ret; + struct resource *sr; + struct platform_device *pd; + + cnt = 5; + if (eject_irq) + cnt++; + if (stschg_irq) + cnt++; + + sr = kzalloc(sizeof(struct resource) * cnt, GFP_KERNEL); + if (!sr) + return -ENOMEM; + + pd = platform_device_alloc("db1xxx_pcmcia", id); + if (!pd) { + ret = -ENOMEM; + goto out; + } + + sr[0].name = "pcmcia-attr"; + sr[0].flags = IORESOURCE_MEM; + sr[0].start = pcmcia_attr_start; + sr[0].end = pcmcia_attr_end; + + sr[1].name = "pcmcia-mem"; + sr[1].flags = IORESOURCE_MEM; + sr[1].start = pcmcia_mem_start; + sr[1].end = pcmcia_mem_end; + + sr[2].name = "pcmcia-io"; + sr[2].flags = IORESOURCE_MEM; + sr[2].start = pcmcia_io_start; + sr[2].end = pcmcia_io_end; + + sr[3].name = "insert"; + sr[3].flags = IORESOURCE_IRQ; + sr[3].start = sr[3].end = cd_irq; + + sr[4].name = "card"; + sr[4].flags = IORESOURCE_IRQ; + sr[4].start = sr[4].end = card_irq; + + i = 5; + if (stschg_irq) { + sr[i].name = "stschg"; + sr[i].flags = IORESOURCE_IRQ; + sr[i].start = sr[i].end = stschg_irq; + i++; + } + if (eject_irq) { + sr[i].name = "eject"; + sr[i].flags = IORESOURCE_IRQ; + sr[i].start = sr[i].end = eject_irq; + } + + pd->resource = sr; + pd->num_resources = cnt; + + ret = platform_device_add(pd); + if (!ret) + return 0; + + platform_device_put(pd); +out: + kfree(sr); + return ret; +} + +#define YAMON_SIZE 0x00100000 +#define YAMON_ENV_SIZE 0x00040000 + +int __init db1x_register_norflash(unsigned long size, int width, + int swapped) +{ + struct physmap_flash_data *pfd; + struct platform_device *pd; + struct mtd_partition *parts; + struct resource *res; + int ret, i; + + if (size < (8 * 1024 * 1024)) + return -EINVAL; + + ret = -ENOMEM; + parts = kzalloc(sizeof(struct mtd_partition) * 5, GFP_KERNEL); + if (!parts) + goto out; + + res = kzalloc(sizeof(struct resource), GFP_KERNEL); + if (!res) + goto out1; + + pfd = kzalloc(sizeof(struct physmap_flash_data), GFP_KERNEL); + if (!pfd) + goto out2; + + pd = platform_device_alloc("physmap-flash", 0); + if (!pd) + goto out3; + + /* NOR flash ends at 0x20000000, regardless of size */ + res->start = 0x20000000 - size; + res->end = 0x20000000 - 1; + res->flags = IORESOURCE_MEM; + + /* partition setup. Most Develboards have a switch which allows + * to swap the physical locations of the 2 NOR flash banks. + */ + i = 0; + if (!swapped) { + /* first NOR chip */ + parts[i].offset = 0; + parts[i].name = "User FS"; + parts[i].size = size / 2; + i++; + } + + parts[i].offset = MTDPART_OFS_APPEND; + parts[i].name = "User FS 2"; + parts[i].size = (size / 2) - (0x20000000 - 0x1fc00000); + i++; + + parts[i].offset = MTDPART_OFS_APPEND; + parts[i].name = "YAMON"; + parts[i].size = YAMON_SIZE; + parts[i].mask_flags = MTD_WRITEABLE; + i++; + + parts[i].offset = MTDPART_OFS_APPEND; + parts[i].name = "raw kernel"; + parts[i].size = 0x00400000 - YAMON_SIZE - YAMON_ENV_SIZE; + i++; + + parts[i].offset = MTDPART_OFS_APPEND; + parts[i].name = "YAMON Env"; + parts[i].size = YAMON_ENV_SIZE; + parts[i].mask_flags = MTD_WRITEABLE; + i++; + + if (swapped) { + parts[i].offset = MTDPART_OFS_APPEND; + parts[i].name = "User FS"; + parts[i].size = size / 2; + i++; + } + + pfd->width = width; + pfd->parts = parts; + pfd->nr_parts = 5; + + pd->dev.platform_data = pfd; + pd->resource = res; + pd->num_resources = 1; + + ret = platform_device_add(pd); + if (!ret) + return ret; + + platform_device_put(pd); +out3: + kfree(pfd); +out2: + kfree(res); +out1: + kfree(parts); +out: + return ret; +} |